#ifndef __MAX31865_H
#define __MAX31865_H

#include "main.h"

#include "std.h"


#define MAX31865_CONFIG_REG 0x00
#define MAX31865_CONFIG_BIAS 0x80
#define MAX31865_CONFIG_MODEAUTO 0x40
#define MAX31865_CONFIG_MODEOFF 0x00
#define MAX31865_CONFIG_1SHOT 0x20
#define MAX31865_CONFIG_3WIRE 0x10
#define MAX31865_CONFIG_24WIRE 0x00
#define MAX31865_CONFIG_FAULTSTAT 0x02
#define MAX31865_CONFIG_FILT50HZ 0x01
#define MAX31865_CONFIG_FILT60HZ 0x00

#define MAX31865_RTDMSB_REG 0x01
#define MAX31865_RTDLSB_REG 0x02
#define MAX31865_HFAULTMSB_REG 0x03
#define MAX31865_HFAULTLSB_REG 0x04
#define MAX31865_LFAULTMSB_REG 0x05
#define MAX31865_LFAULTLSB_REG 0x06
#define MAX31865_FAULTSTAT_REG 0x07

#define MAX31865_FAULT_HIGHTHRESH 0x80
#define MAX31865_FAULT_LOWTHRESH 0x40
#define MAX31865_FAULT_REFINLOW 0x20
#define MAX31865_FAULT_REFINHIGH 0x10
#define MAX31865_FAULT_RTDINLOW 0x08
#define MAX31865_FAULT_OVUV 0x04

#define RTD_A 3.9083e-3
#define RTD_B -5.775e-7

// The value of the Rref resistor. Use 430.0 for PT100 and 4300.0 for PT1000
#define RREF      430.0
// The 'nominal' 0-degrees-C resistance of the sensor
// 100.0 for PT100, 1000.0 for PT1000
#define RNOMINAL  100.0


typedef enum 
{
  MAX31865_2WIRE = 0,
  MAX31865_3WIRE = 1,
  MAX31865_4WIRE = 0
} max31865_numwires_t;


typedef enum 
{
  MAX31865_FAULT_NONE = 0,
  MAX31865_FAULT_AUTO,
  MAX31865_FAULT_MANUAL_RUN,
  MAX31865_FAULT_MANUAL_FINISH
} max31865_fault_cycle_t;

typedef struct
{
    uint8_t chan;

    SPI_HandleTypeDef *spix;

    GPIO_TypeDef *gpio_cs;
    uint16_t gpio_pin_cs;
    GPIO_PinState cs_valid;

    float temperature;

} t_max31865,*p_max31865;


























#endif
